XSD: default integer value range
Well, it depends on the data type...
If you look at the definition of integer at w3:
The value space of integer is the infinite set {...,-2,-1,0,1,2,...}
In essence it means that, for integers, by default there is no min/max value range since any integer can be represented.
On the other hand, for an int:
(...) maxInclusive to be 2147483647 and minInclusive to be -2147483648.
The list goes on for longs, shorts, etc...
You can read it in more detail here: http://www.w3.org/TR/xmlschema-2/#typesystem